[yt-users] mpi4py

[gso at physics.ucsd.edu]

Hi all,

I was trying to use a script that calls yt.func.only_on_root to write the
results to an output file if my script is ran in parallel, when it gave me
the following:

Traceback (most recent call last):
  File "QuantityTotal.py", line 127, in <module>
    yt.funcs.only_on_root(flush, "frames/StarFormationRate.txt", "%12.12e
%12.12e %12.12e %12.12i %12.12e %12.12i %12.12i %12.12i %12.12i\n" %
(yr, TotEmis, redshift, num_sources, 0, Ion10, IonE3, IonE5,
num_star))
NameError: name 'yt' is not defined

I was wondering if either I messed up an import or something similar since
this script was from an older version of yt... with
#from yt.config import ytcfg
#ytcfg["lagos","serialize"] = "False"
commented out at the top.  I also thought that maybe because I was using
only 1 processor so I tried this on multiple processors on Triton after
installing mpi4py by hand, instead I got:

    from mpi4py import MPI
ImportError: No module named mpi4py
Traceback (most recent call last):
  File "QuantityTotal.py", line 6, in <module>
    from yt.mods import *
  File "/home/gso/TritonYT/src/yt-hg/yt/mods.py", line 44, in <module>
    from yt.data_objects.api import \
  File "/home/gso/TritonYT/src/yt-hg/yt/data_objects/api.py", line 34, in
<module>
    from hierarchy import \
  File "/home/gso/TritonYT/src/yt-hg/yt/data_objects/hierarchy.py", line
40, in <module>
    from yt.utilities.parallel_tools.parallel_analysis_interface import \
  File
"/home/gso/TritonYT/src/yt-hg/yt/utilities/parallel_tools/parallel_analysis_interface.py",
line 47, in <module>

I used the same directory for both my YT installation and mpi4py, so I
shouldn't have to change anything for my environment variables such as
where the /lib and /bin are (dev yt 2.1 works fine in serial), so I'm not
sure what's going on now.  Has anyone else encountered anything similar? 
Are they two different problems or one of the same?

From
G.S.